126123238861 has 2 divisors, whose sum is σ = 126123238862. Its totient is φ = 126123238860.

The previous prime is 126123238789. The next prime is 126123238877. The reversal of 126123238861 is 168832321621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72579592836 + 53543646025 = 269406^2 + 231395^2 .

It is an emirp because it is prime and its reverse (168832321621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126123238861 - 2⁹ = 126123238349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126123238361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63061619430 + 63061619431.

It is an arithmetic number, because the mean of its divisors is an integer number (63061619431).

Almost surely, 2^126123238861 is an apocalyptic number.

It is an amenable number.

126123238861 is a deficient number, since it is larger than the sum of its proper divisors (1).

126123238861 is an equidigital number, since it uses as much as digits as its factorization.

126123238861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The spelling of 126123238861 in words is "one hundred twenty-six billion, one hundred twenty-three million, two hundred thirty-eight thousand, eight hundred sixty-one".